*looks at previous post*
So, I've been active on Mastodon for a while - @packbat@dragon.style, DM me when you send your follow request if you want to follow me there - and one of the really important features that was added to it years before I joined was the CW. Basically, some posts are hidden with a freetext-input line of description in which people can describe the content (e.g. "Brexit, debunking Project Fear", "on what it means when someone lets you know that you messed up (quote, transphobia mention)", "lewd" - the amount of detail varies) and let their audience decide if/prepare themselves before they engage with it. And then read it without needing to leave the home timeline (Masto's equivalent of DW's Reading Page).
...the cut tag on my previous post was basically the same thing I would have written when CWing that post on Mastodon.
Kind of funny how these things follow people along as they drift from platform to platform.